השוואת שיטות
סקרו את השיטות שבחרתם זו לצד זו; שורות שבהן יש הבדל מודגשות.
| מדד שטח עלה (LAI)× | מודל גידול יבולים (DSSAT/APSIM)× | |
|---|---|---|
| תחום | אגרונומיה | אגרונומיה |
| משפחה | Process / pipeline | Process / pipeline |
| שנת המקור≠ | 1947 | 1993-2003 |
| הוגה השיטה≠ | Donald J. Watson | James W. Jones, Gerbrand T. Hoogenboom (DSSAT); Brian A. Keating, Peter S. Carberry (APSIM) |
| סוג≠ | Plant morphometric measurement | Mechanistic crop simulation pipeline |
| מקור מכונן≠ | Watson, D. J. (1947). Comparative physiological studies on the growth of field crops: I. Variation in net assimilation rate and leaf area between species and varieties, and within and between years. Annals of Botany, 11(43), 375-407. DOI ↗ | Jones, J. W., Hoogenboom, G., Porter, C. H., et al. (2003). The DSSAT cropping system model. European Journal of Agronomy, 18(3-4), 235-265. DOI ↗ |
| כינויים | LAI, Leaf area, Canopy structure | DSSAT, APSIM, Crop Simulation Model |
| קשורות | 3 | 3 |
| תקציר≠ | Leaf Area Index (LAI) is a dimensionless quantity that measures the total one-sided area of leaves per unit ground area covered by a canopy. It quantifies canopy density and structure: LAI = 0 for bare soil, LAI = 1 for a thin crop, LAI = 3-6 for dense cereal or grass canopies, and LAI > 8 for dense forest. LAI is a key variable in crop growth models, evapotranspiration estimation, and remote sensing because it directly controls light interception, photosynthesis, and water loss from vegetation. | Crop growth models are mechanistic simulation systems designed to predict crop development, biomass accumulation, and yield under varying environmental and management conditions. DSSAT (Decision Support System for Agrotechnology Transfer) and APSIM (Agricultural Production Systems Simulator) are the most widely used platforms, developed in the 1990s-2000s to support agronomic decision-making and climate adaptation research. |
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